Saponaria ocymoidesTumbling Ted. A mat-forming alpine with bright green leaves. Loose clusters of pink flowers in summer. Ideal for the top of a wall. Height 8cm. Spread 45cm. Flowers from June to August. Herbaceous. Hardy.

Saxifraga cotyledonSaxifrage. A rosette-forming saxifrage with rosettes of lime-encrusted, pale green leaves. Upright panicles of white flowers often marked red in late spring and early summer. Height 30-70cm. Spread 20cm. Flowers from May to June. Evergreen. Hardy.